JPH1039732A - Rotary body balancing teaching device and its management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute learning education on balance under various conditions. SOLUTION: A problem setting function 1 selects a subject rotary body from rotary bodies to be simulated, and sets unbalance conditions as problem setting information, and a predicted vibration calculation function 2 models the vibrations of the rotary body and calculates predicted vibrations of the vibration model based on the unbalance conditions. A balance weight calculation function 6 calculates weight information for a balance weight setting performed this time based on a measured vibration curve. A balance weight mounting function 7 fetches the weight information and informs the predicted vibration calculation means of the weight information to make the means repeat the predicted vibration calculation. A marking function 8 marks and evaluates learning contents and results of learners to the set problem.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating body balancing education apparatus and a management system for the apparatus, which are particularly suitable for learning a technique of balancing large rotating bodies such as a steam turbine, a gas turbine, a generator, and a pump. .

[0002]

2. Description of the Related Art Steam turbines, gas turbines, generators,
Vibration of a rotating body including a large rotating machine such as a compressor, a blower, and a pump is caused by many factors intricately intertwined. For example, as shown in FIG. 13, the steam turbine can be roughly divided into (1) a residual unbalance unique to the rotor, (2) an imbalance that may occur during actual operation,
(3) Rubbing vibration, (4) Unstable vibration, (5) Vibration change due to change in alignment, (6) Vibration due to the influence of piping or base. Of these, vibrations due to unbalance cause a large proportion, and therefore, balance is an important technique for reducing vibrations.

[0003] However, the balance technique, which is an important technique, is difficult to learn, and individual characteristics are actually derived for a target rotating body. In addition, steam turbines
Large rotating machines such as generators tend to reduce the unbalance factor at the single item level due to the recent increase in machining accuracy of machine tools and the advancement of assembly technology. Therefore, the vibration problem is reduced even in the power train assembled as a unit, so that the engineer involved in the rotating machine is less likely to have practical experience such as the vibration problem and the balance technology problem.

In recent years, computer support for education has been provided with the advancement of computer main body functions and the development of peripheral technologies and devices for realizing a man-machine interface. No computer support has been provided so far. For this reason, in the actual balance practice, the balance calculation function of the rotating body monitoring device, the rotating body vibration diagnosis device, and the like has been used to learn the rotating body balancing technique.

[0005] Fig. 14 shows a typical example of this type of related art. An actual vibration phenomenon in the turbine / generator 31 is collected by a vibration data measurement function (means) 32 and stored in a vibration data file 36 as measured vibration data. The influence coefficient calculation function (means) 33 uses the vibration data file 36 as an influence coefficient from the vibration data file 36 based on the two vibration data before and after the weight is attached, based on the vibration data, and performs vibration modeling of the rotating body. Model file 3
Save to 7.

Next, the balance weight mounting function (means)
At 34, set the balance weight to be attached this time,
The expected vibration calculation function (means) 35 calculates a numerical value based on the vibration data of the vibration model file 38 serving as a base and the weighting information set by the balance weight attaching function (means) 34 based on the influence coefficient obtained by modeling the vibration prediction. Calculate,
An expected curve obtained on a display device (generally, a CRT) 4 is displayed as a vibration curve. As a vibration curve, a rotation speed-amplitude and phase diagram (S
−VP diagram) and a polar diagram (also called a Nyquist diagram) expressing the amplitude and phase in polar coordinates are generally used in many cases.

[0007]

However, conventionally,
The balance calculation is performed using the vibration data in the vibration data file after the actual rotating body is rotated and the vibration data is collected.The vibration data is limited to the actual thing, and many times in a variety of situations I couldn't try it, and I couldn't expect much of an educational effect.

Accordingly, the present invention aims at acquiring a balance technique corresponding to various causes of vibration (causes of imbalance), and is an advanced, practical, and effective rotating body balancing teaching apparatus and an educational apparatus for the same. The purpose is to provide a management system.

[0009]

According to a first aspect of the present invention, there is provided a task setting for selecting a target rotating body from a plurality of rotating bodies for performing a simulation and setting an unbalance condition as an unbalance amount as task setting information. Means and a task file that stores information necessary to perform vibration modeling including the imbalance condition and information for modeling the vibration of the rotating body. Predicted vibration calculation means for modeling the vibration of the rotating body, calculating the predicted vibration of the vibration model based on the unbalance condition, and storing the predicted vibration results in a vibration data file, and taking the predicted vibration results from the vibration data file The vibration measurement simulation means for outputting the curve to the display device, and the learner performs this time based on the vibration curve measured by the vibration measurement simulation means. Select the method to be applied to the weight adjustment, calculate the weight information for setting the balance weight by the selected method, and weigh the weight information from the weight information file by calculating the weight information to save this to the weight information file. And weight mounting means for notifying weight information to expected vibration calculating means and executing expected vibration calculation by adding weights as a balance condition to be learned this time. According to this means, when the learner sets the task setting information from the task setting means, data necessary for performing the expected vibration calculation of a large number of rotating bodies is stored in advance from a task file in which data for modeling the target rotating body is obtained. And the data of the unbalance condition are taken out, and the expected vibration is calculated. Therefore, since balance learning can be performed for a large number of various rotating bodies, the effect of education is far greater than that in the case where the expected vibration is calculated only for a limited number of rotating bodies of a conventional actual machine.

[0010] According to a second aspect of the present invention, in the rotating body balancing education apparatus according to the first aspect, a process value setting for selecting a process which affects the unbalanced vibration of the target rotating body for which the task has been set and for setting a process amount thereof. Means, an unbalance amount based on the process selected by the process value setting means and an unbalance amount based on the process amount, and an unbalance amount obtained by adding the unbalance amount to the unbalance condition set by the task setting means. A calculating means is added. According to this means, it is possible to perform a simulation close to an actual machine in which the effect of the process amount on the vibration of the rotating body is added, and the results obtained by the advanced learning experience can be used for vibration countermeasures.

According to a third aspect of the present invention, in the rotating body balancing education apparatus according to the first or second aspect, a scoring means for scoring and evaluating based on a learner's learning content for the task setting and an obtained operation result. It is to be added. According to this means, since the scoring corresponding to the task is objectively performed, learning can be evaluated, and the result of the learner can be efficiently achieved at an early stage.

According to a fourth aspect of the present invention, there is provided a management system for a rotating body balancing education apparatus including a plurality of rotating body balancing education apparatuses each including a computer for learning a balance technique and a server computer for managing these apparatuses. Task setting means for selecting a target rotating body from a plurality of rotating bodies to be simulated, and setting an unbalance condition as an unbalance amount as task setting information in the server computer; and learning of the task setting by the task setting means. Scoring means for scoring and evaluating based on the learning content of the learner and the obtained operation results, and each of the rotating body balancing education devices is provided with a prediction including information for modeling the vibration of the rotating body and imbalance conditions. Search and search based on the assignment file that stores the information required to perform the vibration calculation and the set assignment information A vibration model of the rotating body from the received information, calculates an expected vibration of the vibration model based on the imbalance condition, and saves the expected vibration result in a vibration data file; A method for selecting a method to be applied to the weight adjustment performed by the learner based on the vibration measurement simulating means for taking in the result and outputting the vibration curve to the display device, and the vibration curve measured by the vibration measurement simulating means. Calculates weight information to set the balance weight according to, and calculates the weight information from the weight information file and saves the weight information to the weight information file. Weight calculation to execute expected vibration calculation by weight addition as balance condition Is obtained so as to provide a means. According to this means, the task setter can teach a plurality of learners alone, and since the operation results of the plurality of learners are shared on the network, the operation and the tendency of the learner for the task can be performed. Can be analyzed, and effective assignments can be made when giving advice and assistance to students for assignments and creating assignments.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a rotating body balancing education apparatus according to a first embodiment of the present invention.

The rotating body balancing education apparatus includes a task setting function (means) 1, an expected vibration calculation function (means) 2, a vibration measurement simulation function (means) 3, a display device 4, a printing device (XY plotter) 5, and a balance weight. Calculation function (means) 6, balance weight attaching function (means) 7, and scoring function (means)
8, a printing device (printer) 9, a task vibration file 12, a task condition file 13, a vibration data file 14, a weight information file 15, and an operation information file 1.
6 is comprised.

Here, the task setting function (means) 1 selects a target rotating body from a plurality of rotating bodies to be simulated, and sets an unbalance condition as an unbalance amount as task setting information. The anticipated vibration calculation function (means) 2 sets a task vibration file 12 and a task condition file 13 for storing information necessary for performing a predicted vibration calculation including information for modeling the vibration of the rotating body and an unbalanced condition. Based on the retrieved task setting information, a vibration model of the rotating body is formed from the retrieved information, an expected vibration of the vibration model is calculated based on the imbalance condition, and the expected vibration result is stored in the vibration data file 14. The vibration measurement simulation function (means) 3 takes in an expected vibration result and outputs a vibration curve to the display device 4. The balance weight calculation function (means) 6 selects a method applied to the weight adjustment performed this time by the learner based on the vibration curve measured by the vibration measurement simulation function (means) 3, and sets the balance weight by the selected method. Is calculated, and this is stored in the weight information file 15. The balance weight attaching function (means) 7 fetches the weight information from the weight information file 15, performs the weight information to the expected vibration calculating function (means) 2, and calculates the expected vibration by adding the weight as the balance condition to be learned this time. Is executed. The scoring function (means) 8 scores and evaluates the learner's learning content for the task setting and the obtained result.

Next, the operation of the first embodiment of the present invention will be described according to the processing procedure shown in FIG.

First, a learner or a task setter sets task setting information by interactive processing on a task setting screen 51 as shown in FIG. 3 (S1). That is, the target rotator is selected, and in the task setting screen 51, the task vibration file 12 is displayed.
One of the phenomena A, B, C,... Is selected. The bearing (NO), weight (g), and phase (degree) are set for the unbalance amount as the unbalance condition. Further, the number of activations (not more than a predetermined number of times) is set. As a result, the task setting information by the task setting function (means) 1 is stored in the task vibration file 12 and the task condition file 13. Further, a vibration model of the target rotating body is created based on the task setting information by the task setting function (means) 1 (S2).
This result is stored in the task vibration file 12. The expected vibration calculation function (means) 2 calculates the expected vibration based on the following equation (1).

[0019]

(Equation 1)

Further, the unbalance amount (U) is expressed by the following equation (2).

(U) = (u) + (W) (2) (u): Unbalance amount in task setting (W): Unbalance amount by set balance weight

The predicted vibration data obtained by the predicted vibration calculation function (means) 2 is stored in the vibration data file 14 (S3). The vibration measurement simulation function (means) 3 fetches expected vibration data from the vibration data file 14 and simulates a measurement (for example, how many rotation intervals by a speed increase rate, a measurement cycle, etc.) according to the operating condition of the target rotating body, and furthermore, a real sensor. The predicted vibration data is read as if the input was made from the, and displayed on the display device 4 as a vibration curve as shown in FIG. 4 (S4). Further, printing is performed on an XY printing device (XY plotter) 5 or the like at the request of the learner. As a vibration curve shown in FIG. 4, the relationship between the rotation speed, the amplitude, and the phase is shown (A diagram), and the rotation speed-amplitude, phase diagram (SVP diagram).
Alternatively, a polar diagram (also referred to as a Nyquist diagram), which is a diagram in which the amplitude and phase are expressed in polar coordinates (FIG. B), is used.

The learner analyzes the vibration curve shown in FIG. 4 for the task, and performs balance adjustment by selecting a balance calculation method on a selection screen 52 shown in FIG. The method to be performed is selected (S5). On the selection screen 52, in the case of manual operation, the learner calculates the balance vector by calculating the vibration vector and the effect vector based on the weight by himself / herself, and in other cases, automatically calculates the necessary balance weight in the subject vibration by each method. I do. In addition, in the effect vector method, a vibration vector at a specific rotation speed and condition at a specific bearing is calculated by vector calculation, and with the least square method, vibration at all rotation speeds and conditions of all bearings is minimized. Calculate and calculate such a weight. Information obtained by the balance weight mounting simulation is stored in the weight information file 15 as weight information.

Next, the balance weight mounting function (means)
At step 7, as shown in FIG. 6, the balance weight mounting / removing screen 53 is set to the actual balance weight mounting surface (correction surface) of the rotating body. As shown in FIG. 6, first, when a target correction surface is selected, the selected correction surface is displayed, and the balance weight mounting method and mounting position for the correction surface are also displayed, as shown in FIG. The learner sets the balance weight in a manner similar to the actual experience. The weight information attached at this time is represented by the following equation (3).

[0025]

(Equation 2)

The weight information of the above equation (3) is obtained by the following equation (1).
And the unbalance amount for calculating the expected vibration by equation (2), and the expected vibration is calculated again by the expected vibration calculation function (means) 2 by adding the balance weight (S6).

As a result, a vibration prediction result (or weight effect) based on the balance weight set by the learner is calculated, and confirmed by a vibration curve on the display device 4 (S
7). Thereafter, this operation is repeated until the vibration value finally satisfies the target condition. Alternatively, the balance is adjusted a specified number of times (S8).

When the balance adjustment is completed or when the designated number of times has been reached, the scoring function (means) 8 determines the task condition file 13 by the task setting function (means) 1 and the finalized by the expected vibration calculation function (means) 2. Vibration data file 1
4 and the final weight information file 15 by the balance weight calculating function (means) 6 and the operation data file (operation history) 16 by the balance weight attaching function (means) 7 to fetch the relevant data executed this time. Then, the learner's current balance adjustment work is graded based on the grade tables shown in FIGS. 7 and 8 (S9). The scoring is performed based on the change of the vibration value due to the balance adjustment work, the final value,
Regarding the vibration value, scoring is performed by describing in the scoring table 61 shown in FIG. 7 the dangerous speed, the rated rotation speed, the rated load, etc. for each operating state, and the operation content is learned as in the scoring table 62 shown in FIG. The method and operation contents selected by the user are scored, and the evaluation is performed in consideration of each of them. Further, the scoring result is output to the display device 4 or the printing device (printer) 9 for confirmation.

As described above, according to the first embodiment, it is possible to set a variety of tasks corresponding to the unbalance factors that actually cause vibration trouble, and the learner can clearly understand the purpose of the balance adjustment. To solve problems. In addition, by scoring the weight setting operation performed by the learner in a scoring method corresponding to each task, it is possible to evaluate the operation itself in addition to the evaluation of the target vibration value, greatly improving the learning effect of the learner Can be.

FIGS. 9 and 1 show a second embodiment of the present invention.
0 will be described.

The second embodiment is different from the first embodiment in that a process value operating function (means) 10 is a process value setting means for selecting and setting a process value which affects the unbalanced vibration of the rotating body. An unbalance amount calculation function (means) 11 for calculating an unbalance amount based on the selected process value and the process amount is provided, and the feature is that learning of rotating body balancing including the process value is performed.

That is, as described above, there are various causes for the vibration, and one of the causes is that the vibration state changes depending on a parameter such as a process value. For example,
An oil whip is likely to occur in a certain rotation speed range and under a certain oil temperature environment. This is shown in FIGS. 10 and 11
In this embodiment, a balance technique including these cases and a method of reducing vibration are learned.

In the example shown in FIG. 10, the magnification of the rotation speed with respect to the oil temperature is shown by a function shown in the drawing, and the magnification sharply increases in a certain range of the rotation speed. Further, as shown in FIG. 11, abnormal vibration (unbalance) occurs according to the magnitude of the change in lubricating oil temperature.
When the amount is added to the predicted vibration (before the superposition amount), the result becomes the predicted vibration (after the superposition amount).

In the above configuration, as in the first embodiment, the learning tasks given by the task setting function (means) 1 are set in a learning system in which the balance weights are sequentially attached and the balance reduction is repeated. When a vibration change by a process value with respect to is possible, a target process value is selected in the process value operation function (means) 10 and a process value corresponding to the operation state at that time is set. The unbalance amount calculation function (means) 11 models the amount of unbalance due to the process value as weight information, and the expected vibration calculation function (means) 2 superimposes on the unbalance amount, calculates the expected vibration, and saves it in the vibration data file 14. I do. Thereafter, as in the case of the first embodiment, this is repeated until the target value becomes equal to or less than the vibration value, and the operation of the learner is confirmed based on the scoring result.

As described above, according to the second embodiment, it is possible to simulate operating condition adjustment and alignment adjustment as weight adjustment under specific conditions, and to match the actual operating condition of the rotating body. It can be useful for learning vibration countermeasures and balance techniques.

Next, a third embodiment of the present invention will be described with reference to FIG.

In the third embodiment, the task setting function (means) 1 and the scoring function (means) 8 are provided in the server computer 100, while each of the rotating body balancing education devices 101A, 101B. In each of them, an expected vibration calculation function (means) 2, a vibration measurement simulation function (means) 3, a display device 4, a balance weight calculation function (means) 6, and a balance weight mounting function (means) similar to those of the first embodiment ) 7 are connected to the server computer 100 and the rotating body balancing education devices 101A, 101B,.
2A and 102B and a parameter (file) 103 are connected via a network.

In the above configuration, the task assigner creates a balance adjustment task on the server computer 100 and gives the same task to a plurality of learners at the same time. Each learner learns the balance adjustment technique in the same way as in the first embodiment, with the tasks given by the respective client computers.

According to the third embodiment, the task assigner can teach a plurality of learners alone. Also,
By sharing the operation results of multiple learners on the network, it is possible to analyze the learners' operations and trends for the tasks, and it is also effective when giving advice and assistance to the learners and creating tasks It is possible to create various issues.

[0040]

As described above, according to the first aspect of the present invention, when the learner sets the task setting information from the task setting means, data necessary for performing the expected vibration calculation of a large number of rotating bodies is stored in advance. Data of modeling of the target rotating body and data of unbalance conditions are extracted from the subject file to be
The expected vibration calculation is performed. Therefore, since balance learning can be performed for a large number of various rotating bodies, the effect of education is far greater than that in the case where the expected vibration is calculated only for a limited number of rotating bodies of a conventional actual machine.

According to the second aspect of the present invention, it is possible to perform a simulation close to an actual machine in which the effect of the process amount on the vibration of the rotating body is taken into consideration, and to use a result obtained by providing a higher learning experience as a measure against vibration. .

According to the third aspect of the present invention, the scoring corresponding to the task is objectively performed, so that the learning can be evaluated, and the result of the learner can be efficiently achieved at an early stage.

According to the fourth aspect of the present invention, a single task setter can teach a plurality of learners, and the operation results of the plurality of learners are shared on a network. It is possible to analyze the operation and tendency performed by the learner, and to provide advice and assistance to the learner for the task, and to create an effective task when creating the task.

[Brief description of the drawings]

FIG. 1 is a block diagram of a rotator balancing education device according to a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating a schematic process of a rotating body balancing education apparatus according to the first embodiment of the present invention.

FIG. 3 is a diagram illustrating an example of an assignment setting screen according to the first embodiment shown in FIG. 1;

FIG. 4 is a diagram showing a vibration curve by vibration measurement of the first embodiment shown in FIG.

FIG. 5 is a diagram showing an example of a screen for selecting a balance weight calculation method according to the first embodiment shown in FIG. 1;

FIG. 6 is a diagram illustrating an example of mounting / removing a balance weight according to the first embodiment shown in FIG. 1;

FIG. 7 is a diagram illustrating a first example of a scoring table according to the first embodiment shown in FIG.

FIG. 8 is a diagram illustrating a second example of the scoring table of the first embodiment shown in FIG.

FIG. 9 is a block diagram showing a second embodiment of the present invention.

FIG. 10 is an explanatory diagram illustrating an influence of a process amount on vibration.

FIG. 11 is an explanatory diagram showing modeling of unbalance and superimposition of unbalance based on process values according to the second embodiment shown in FIG. 9;

FIG. 12 is a block diagram showing a third embodiment of the present invention.

FIG. 13 is a diagram illustrating a cause of vibration of a rotating body and a cause of unbalanced vibration.

FIG. 14 is a block diagram illustrating an example of conventional balancing learning.

[Explanation of symbols]

 1 Assignment setting function (means) 2 Expected vibration calculation function (means) 3 Vibration measurement simulation function (means) 6 Balance weight calculation function (means) 7 Balance weight attaching function (means) 8 Scoring function (means) 10 Process value operation function (Means) 11 Unbalance amount calculation function (Means) 100 Server computers 101A, 101B Rotating body balancing education device

Claims (4)

[Claims] 1. A task setting means for selecting a target rotator from a plurality of rotators for performing a simulation and setting an unbalance condition as an unbalance amount as task setting information, and performs vibration modeling of the rotator. A task file that stores information necessary for performing expected vibration calculation including information and unbalance conditions is searched by the set task setting information, and a vibration model of the rotating body is formed from the searched information. An expected vibration calculating means for calculating an expected vibration of the vibration model based on the balance condition and storing the expected vibration result in a vibration data file; and taking the expected vibration result from the vibration data file and outputting a vibration curve to a display device. Based on the vibration measurement simulation means and the vibration curve measured by the vibration measurement simulation means, Selecting a method to be used, calculating weight information for setting balance weight according to the selected method, balance weight calculating means for storing this in a weight information file, and taking in weight information from the weight information file, A rotating body balancing education device, comprising: weight attachment means for notifying weight information to expected vibration calculation means and executing expected vibration calculation by adding weights as a balance condition to be learned this time. 2. A process value setting means for selecting a process which affects the unbalanced vibration of the target rotating body for which the task is set, and setting a process amount thereof, and a process and a process amount selected by the process value setting means. 2. An unbalance amount calculating means for calculating an unbalance amount based on the unbalance condition set by the task setting means and for setting the unbalance condition in consideration of the unbalance amount. Rotating body balancing education device. 3. The rotating body balancing education apparatus according to claim 1, further comprising a scoring means for scoring and evaluating the contents of the task setting based on the learner's learning contents and the obtained operation results. . 4. A management system for a rotating body balancing education apparatus, comprising: a plurality of rotating body balancing education apparatuses each including a computer for learning a balance technique; and a server computer for managing these apparatuses. A task setting means for selecting a target rotating body from a plurality of rotating bodies to be simulated, and setting an unbalance condition as an unbalance amount as task setting information; and a learning content of a learner for the task setting by the task setting means. And a scoring means for scoring and evaluating based on the obtained operation result, and each of the rotating body balancing education devices performs an expected vibration calculation including information for modeling a vibration of the rotating body and an imbalance condition. An assignment file that stores information necessary to perform the search, and the search is performed by searching according to the set assignment setting information. A vibration model of the rotating body from the information, an expected vibration calculating means for calculating an expected vibration of the vibration model based on the unbalance condition and storing an expected vibration result in a vibration data file; A vibration measurement simulating unit that takes in the results and outputs the vibration curve to the display device, and a method that is applied to the weight adjustment performed by the learner based on the vibration curve measured by the vibration measurement simulating unit, is selected.
Calculating weight information for setting the balance weight according to the selected technique, and calculating the weight information from the weight information file; and obtaining weight information from the weight information file. And a weight attaching means for executing an expected vibration calculation by adding a weight as a balance condition to be learned this time.